GB/T 21451.2-2019: Petroleum and liquid petroleum products -- Measurement of level and temperature in storage tanks by automatic methods -- Part 2: Measurement of level in marine vessels

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Scope

This Part of GB/T 21451 provides the accuracy, installation, calibration and inspection
guidance for immersive and non-immersive automatic level gauge (ALG), which is
adopted for the measurement of level of petroleum and liquid petroleum products,
which are transported in marine vessels and with the Reid vapor pressure of less than
100 kPa.
This Part also provides the guidance for the application of marine ALG in custody
transfer metering. However, generally speaking, the consensus of both parties
involved in the custody transfer metering is needed.
This Part is inapplicable to the measurement of level in refrigerated marine vessels.

Basic Data

Standard ID	GB/T 21451.2-2019 (GB/T21451.2-2019)
Description (Translated English)	Petroleum and liquid petroleum products -- Measurement of level and temperature in storage tanks by automatic methods -- Part 2: Measurement of level in marine vessels
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	E30
Classification of International Standard	75.180.30
Word Count Estimation	14,132
Date of Issue	2019-03-25
Date of Implementation	2019-10-01
Quoted Standard	GB/T 13236; GB/T 13894; GB/T 21451.5; ISO 1998-1; ISO 1998-2; ISO 1998-3; ISO 1998-4; ISO 1998-5; ISO 1998-6; ISO 1998-7; ISO 1998-99; ISO 8697-1999
Adopted Standard	ISO 4266-2-2002, MOD
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration
Summary	This standard specifies the accuracy, installation, calibration and inspection of immersed and non-immersed automatic level gauges (ALGs) for level measurement of petroleum and liquid petroleum products with a Reid vapor pressure of less than 100 kPa, transported in oil tanker tanks guide. This standard also specifies guidelines for the use of marine ALGs for handover metering, but usually requires the unanimous agreement of the handover parties. This standard does not apply to liquid level measurement in refrigerated oil tanks.